Scott Haseley
94a222b2ba
Automatic update from web-platform-tests ElementTiming: add a test for overwriting text Per https://www.w3.org/TR/paint-timing/#mark-paint-timing, step 6.1, text elements aren't reconsidered to be painted nodes, which means only one paint should count towards elementtiming. This CL adds a test for this, as a baseline before we start messing around with this for soft navs. Bug: 424437484 Change-Id: I79bafd6e4720b6159610e3b8f02a861e83a62361 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6803129 Commit-Queue: Scott Haseley <shaseley@chromium.org> Reviewed-by: Johannes Henkel <johannes@chromium.org> Cr-Commit-Position: refs/heads/main@{#1495126} -- wpt-commits: 8c4fc7604ca96eeed3efeb5b9c386b378e26c8a7 wpt-pr: 54090
53 lines
2.0 KiB
HTML
53 lines
2.0 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>Element Timing: text not observed when changed</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/element-timing-helpers.js"></script>
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<p id="content" elementtiming="initial-text">This is some text</p>
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<div id="target"></div>
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<script>
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promise_test(async t => {
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assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
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let entries = await new Promise(resolve => {
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new PerformanceObserver((list, observer) => {
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resolve(list.getEntries());
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observer.disconnect();
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}).observe({type: 'element', buffered: true});
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});
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assert_equals(
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entries.length, 1,
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'Expected exactly one ElementTiming entry for initial text');
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assert_equals(
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entries[0].identifier, 'initial-text',
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'Unexpected ElementTiming entry; expected "initial-text"');
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// Update existing text. We should not get an entry for this.
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content.innerText = "This is new text for an existing element";
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// Add new text. We should get an entry for this.
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target.innerHTML = '<div elementtiming="new-element-text">This is new text for a new element</div>';
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// Wait for the ElementTiming entry. Note: it's okay to kick this off after
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// after modifying the DOM because paint timing isn't marked until
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// rendering, which happens in a separate task.
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entries = await new Promise(resolve => {
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new PerformanceObserver((list, observer) => {
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resolve(list.getEntries());
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observer.disconnect();
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}).observe({type: 'element'});
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});
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assert_equals(
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entries.length, 1,
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'Expected exactly one ElementTiming entry for additional text');
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assert_equals(
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entries[0].identifier, 'new-element-text',
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'Unexpected ElementTiming entry: expected "new-element-text"');
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}, 'Changing the text of an already-observed element is not observed');
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</script>
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